E.S. GRIGORKINA, A.V. KUZMIN, S.V. SERGEEV Penza State University, 40 Krasnaya St., Penza, Russian Federation, 440026 Grigorkina E.S. — Assistant of the course of otorhinolaryngology of the Department of Maxillofacial Surgery, tel. (8412) 32-21-77, e-mail: grigorkina87@gmail.com Kuzmin A.V. — Cand. Tech. Sc., Associate Professor of the Department of information and computation systems, tel. (8412) 36-82-38, […]